Rosedale-Moore Park Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
8.2
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
601.5 mg/L
Est. Daily Cost
$0.63
energy & soap waste
Source: Health Canada Water Quality · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Rosedale-Moore Park, your appliances are currently losing 32% efficiency due to mineral buildup.
| Appliance | In Rosedale-Moore Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.7 yrs | 8.5 yrs | -80% |
| Washing Machine | 4.8 yrs | 12 yrs | -60% |
| Water Heater | 6.1 yrs | 15 yrs | -59% |
Regional Water Comparison
How Rosedale-Moore Park compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Rosedale-Moore Park, Ontario | 238 mg/L | Very High | 🔴 Very Hard |
| North St.James Town, Ontario | 236.5 mg/L | Very High | 🔴 Very Hard |
| Yonge-St.Clair, Ontario | 237 mg/L | Very High | 🔴 Very Hard |
| Cabbagetown-South St.James Town, Ontario | 240.5 mg/L | Very High | 🔴 Very Hard |
| Mount Pleasant East, Ontario | 237 mg/L | Very High | 🔴 Very Hard |
National Benchmark
How Rosedale-Moore Park compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rosedale-Moore Park | 238 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
Bring Vancouver-quality water to your Rosedale-Moore Park home
Shop water softeners on Amazon.com →
What Makes Rosedale-Moore Park's Water Unique?
Local geology and source profile
Rosedale-Moore Park (two of Toronto's most prestigious and historic residential neighbourhoods — Rosedale with its winding ravine roads and grand Victorian mansions north of Bloor, and Moore Park's stately homes overlooking the Moore Park Ravine — collectively forming the most expensive real estate enclave in Canada, home to corporate executives, old-money families, and diplomats in the streets surrounding the ravine system east of Yonge and north of Bloor) receives its drinking water from the City of Toronto, drawing from Lake Ontario via the F.J. Horgan Water Treatment Plant. Water is treated using ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) standards. Hardness in this distribution zone is 238 mg/L (13.9 gpg) — classified as very hard by Health Canada, with TDS of 602 mg/L, consistent with the central Toronto distribution corridor.
Rosedale-Moore Park receives F.J. Horgan plant Lake Ontario supply through the central Toronto distribution network — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) supplying all Toronto boroughs. The 238 mg/L is consistent with the adjacent Thorncliffe Park (238 mg/L) and Englemount-Lawrence (238.5 mg/L), confirming the standard very hard supply throughout central and north-central Toronto.
At 238 mg/L, Rosedale-Moore Park residents — in some of Canada's most valuable and historically significant properties — face the same persistent scale challenges as all Toronto homeowners. Kettle and showerhead descaling every one to two weeks is typical. The neighbourhood's exceptional pre-war housing stock — mansions along the curving ravine roads of Elm Avenue, Crescent Road, and Park Lane Circle — represents some of Toronto's highest-priority lead service line review properties; the City of Toronto's programme at toronto.ca/water is strongly recommended for all pre-1940 Rosedale and Moore Park properties.
Geology & Source: Supplied by City of Toronto from Lake Ontario via the F.J. Horgan Water Treatment Plant — the Rosedale-Moore Park central Toronto distribution zone carries very hard water at 238 mg/L (13.9 gpg), consistent with the Forest Hill and Rosedale supply corridor.